Chemistry Semester I Final Review

Front

What is the study of matter and the changes it undergoes known as?

Back

Chemistry

Front

What does the principal energy level (n) represent?

Back

The principal energy level represents the average distance an electron can be found from the nucleus (i.e., the energy level the electron resides in).

Front

What is the shape and polarity of HCN?

Back

Linear shape, polar molecule.

Front

What is the difference between a cation and an anion?

Back

A cation is an ion with a positive charge, while an anion is an ion with a negative charge.

Front

What is the electron configuration using the noble gas shortcut for Ra?

Back

[Rn] 7s².

Front

Define an ion.

Back

An ion is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in an atom and determines the element's identity.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond formed by the sharing of electron pairs between atoms.

Front

What is the difference between an ionic bond and a covalent bond?

Back

An ionic bond is formed through the transfer of electrons from one atom to another, while a covalent bond is formed by the sharing of electrons.